Update dependency rack-mini-profiler to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rack-mini-profiler (source, changelog)	3.3.1 -> 4.0.0

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Release Notes

MiniProfiler/rack-mini-profiler (rack-mini-profiler)

v4.0.0: 4.0.0

Compare Source

• [BREAKING CHANGE] Ruby version 3.1.0 or later is required. #​632
• [FEATURE] Implement prepend patch for postgres #​625
• [FEATURE] Show Active Record QueryCache hits in UI. #​640
• [FEATURE] Show record type and count in SQL query UI. #​638
• [FIX] Requests page fails due to trying to modify a frozen string. #​630
• [FIX] alignment of SQL query start times. #​627
• [FIX] Lower case HTTP response headers to be compatible with Rack 3 #​628
• [FIX] Truncate long profiler name in profiler popup. #​634
• [FIX] flamegraph_mode query param having no effect. #​635
• [FIX] max_traces_to_show had chance to break the profiler frontend #​297

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